Floor and surfacing machine



Mar. 20, 1923. l

J. KIGAS. FLooH AND SuRFAcqNG MACHINE.

2 SHEETS-SHEET 2 FILED OCT. 28| 192i.

l Patent oi the United States', tiled by me Patented lll/liar.. 2G, 1923.

JOHN' KIGAS, OF CHICAGO, LLINOS, .iSSGNR 10 ALEX WASLEFF, OF CHICAGO, LLNOlIS.

FLOOR AND SURFCING MCHNE.

Original application led February 28, 1921,

ber 28, 1921.

To all whom t may concer/n:

13e it known that l, JOHN Krans, a citizen o' Latvia, Russia, resident of Chicago, .in the county of Cook and State ot illinois.4 have invented certain new and useful limprovenients in Floor and Surfacing Machines, of which the following is a full, clear, and exact description.

My invention relates ing the pressure against the Hoor of the sandpapering or smoothing rollers of iioor and surfacing machines constituting the subject-matter of an application tor Letters to means tor regulat- February 28, 1921, Serial VNumber 918,82@ of which this application is a division.

The object oi' this invention is to enable the sandpaperingl rollers to press evenly down against the floor when the machine is in operation so as to produce a smooth even surface that will avoid a corrugated appearance. rlfliis i accomplish by means hereinafter fully described and as particularly claimed.

1n the drawings:

Figure 1 is a side elevation of the machine to which this invention is applied.

Figure 2 is a horizontal section ot the same, in which features not constituting' parts of said invention are eliminated.

Figure 3 is a vertical longitudinal section taken on dotted line 3, 3, Figure 2.

Figure 1 of the drawings illustrates the machine to which my improvements are applied, although it will be understood that they can be applied to any floor smoothing,` machine so constructed as to permit their application. This machine possesses wheels that support and guide it, and means for actuating said wheels, and these wheels maintain the framework and other parts of the machine at a certain distance above the floor. My invention is` carried by said framework and is designed to regulate the downward pressure of the smoothing4 rollers against the floor.

The supporting Jframework of the machine consists of parallel side sills A., A., that are tied together, preferably, by a platform B, and a transom C. rllhe drive wheels D, D, are driven through suitable means by an electric motor E supported upon said plat- Serial No. 448,326. Eivided and this application filed Octo- Serial No. 511,038.

torni, and the guide-wheels F, F, are journaled on the ends ot a transverse axle G.

Secured to the side sills, at their upper edges, are side-trames 5, 5, and just outside of said irame on one side ot the machine are parallel aprons, 6 and 7, that aresupported by bolts 8, 8, tapped into the side-frame.

Pivotally secured to the sides of the sidetraine are two pairs of levers 9, 9, and 10, 10, trat extend longitudinally and are so ari'aiiiged that the levers 9, 9, and 10, 10, are practicaily ulcrumed in alinement.

The ends ot these levers, near the ends of the machine are provided with hearings 1l, 11, for the 'journals of the shaft 12, projecting axially from the ends of the smoothing rollers 13, 13.

The tulcrums 141;, le, oi levers 9, 9, and 10, 10, project out through longitudinal elon- `@fated openings 15, 15, therein, and havenuts 16, 16, tapped longitudinally into their outer ends to retain the levers in position.

r1`he inner ends of these levers terminate betere they reach the center of length of the machine and have links 17 17, pivotally secured thereto, that extend vertically and have their upper ends pivotally` connected to the ends of a walking-beam 18. This walking-beam extends longitudinally and, at its center of length is tulcrumed at 19 to the ends of a cross-bar 29. This cross-bar er;- tends from side sill to side sill and its ends are seated in the side sills and it is limited to a vertical movement by means oi pins 2l., 21, extending downwards trom its ends that enter openings 22, 22.` in the side trames.

The journals of the armature shatt oit the .motoreznend through their bearings on one side of the machine, and one ot them has a sprocket-wheel securely mounted thereon,and this sprocket-wheel is connected by a drive-chain, 2e, to a sprocket-pinion, 25, and a sprocket-gear, 26, that give it a tri an guiar course. The sprocket-gear 26 is securely mounted upon a transverse spindle, 26, the ends of which are `iournaled in aprons 6 and 7, and alongside of this sprocket-gear 26 is secured another gear. 27 that intermeshes with a corresponding` ,gear 28 secure-ly mounted upon atransverse spindle., 29, whose ends are journaled in said apron. Gear 27 is connected to a sprocket-wheel, 30, on the end of the trunnion or journal of the shaft of the smoothing-roller at one end of the machine, by a sprocket-chain, 3l, and alongside of gear 28, a suitable sprocket-wheel, 32, is secured on spindle, 29? and by a sprocket-chain, 33, is'conne'cted toa sprocketpinion, 34, on the end of the trunnion of the smoothing-roller on the same side and at the other end of the machine.

VVhe'n the mach-ine is travelling in one direction and some obstruction is met and ridden over by the smoothing-roller, the oppositesmoothing-roller will be pressed downwards, and when it is desired to raise both of said rollers, the pressure of the toot of thel operator upon the cross-bar 20 will cause both of saidrollcrs to move upwards.

The ends ofthe levers nearest the ends of the machine kept pressing downwards by vertically disposed contraction springs 35, The lower ends of these springs terminate in seats 36, 36, in the top of theI bearings of the levers, and the upper ends of the springs are articulated with rings in the lower ends of the ring-bolts 37, that extends upward through lugs7 38, and are provided with nuts 39, on their screwthreaded ends above said lugs.

My invention will best serve the purpose of its construction by making' the smoothingrollers very yielding. This l accomplish by the means hereinabove described, but I do not wish to be limited to these means, as an expert mechanic, when he is made to realize the objects and purposes of the use of the smoothing-rollers, may be able to devise modifications of the means have hereinabove described.

VVhat I claim as new is:

l. A sandpapering' machine comprising a suitable supporting-trame, means for propelling the same, transversely disposed rotatable abrading drums, and devices for controlling the pressure of said drums against the surface of the floor over which the machine is travelling; so that when 'one roller moves over an obstacle the other will move downwards and sov that the operator can movevsaid rollers simultaneously downwards.

2. sandpapering machine comprising a suitable supporting-trame, a motor mounted thereon, longitudinally disposed levers tulcrumed to the sides of said supportingframe, transversely disposed abrading rollers journaled in bearings in the ends of said levers adjacent to the ends ot the machine and means consisting or' links and a Wallring-beam for connecting the adjacent ends of levers on the same side oit said machine.

3. i. sandpapering machine comprising` a suitable supporting-trame, a motor mounted thereon, longitudinally disposed levers longitudinally adjustably fulcrumedV to the sides of said supporting-frame, transversely disposed abrading rollers journaled in bearings in the ends oi said levers adjacent to the ends ol the machine and means connecting' the acent ends of levers on the same side of said machine.

d. sani'lpapering machine comprisingl suitable supportin.g-frame, a motor mounted thereon, longitudinally disposedllevers longitudinally aojustably ulcrnmed to the sides of said supporting-frame, transversely disposed abrading rollers journaled in bearings in the ends of said levers adjacent to the endsot the machine and means consisting,` of links and a. walking-beam -for connect the adjacent ends of levers on the same.. of said machine. l'

ln witness whereof, I hereunto set my hand and seal this 13th day of October,V 1921.

JOHN lIGf'i-El;

VTWitnesses FRANK D. Ti-roMAsoN, lV. A. KEPLINGER. 

